TABLE 1.
Number of environmental mycobacteria counted at seven study sites on the Rio Grandea
| Site | No. (CFU/10 ml)
|
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb 02 | Mar 02 | Apr 02 | May 02 | Jun 02 | Jul 02 | Aug 02 | Sept 02 | Oct 02 | Nov 02 | Dec 02 | Jan 03 | Feb 03 | All | |
| 1 | 123 | 11 | 17 | AG | AG | AG | 0 | 3 | 14 | 22 | 1 | TNTC | 80 | 30 ± 42 |
| 2 | 6 | 5 | 14 | AG | AG | AG | * | 2 | 1 | 7 | 9 | TNTC | 15 | 7 ± 5 |
| 3 | 1 | 5 | 2 | AG | AG | AG | * | 1 | 27 | 6 | 4 | * | SNT | 7 ± 9 |
| 4 | 4 | 40 | 5 | AG | AG | AG | 3 | 4 | 24 | 30 | 11 | 100 | SNT | 25 ± 31 |
| 5 | 1 | 0 | 0 | AG | AG | AG | 0 | 3 | 4 | 10 | * | TNTC | SNT | 3 ± 4 |
| 6 | ND | ND | 6 | AG | AG | AG | * | 1 | 0 | 3 | ND | ND | SNT | 3 ± 3 |
| 7 | 31 | 4 | 0 | AG | AG | AG | 2 | 0 | 17 | 12 | * | 61 | 79 | 23 ± 28 |
a
Number given is CFU/10-ml water volume processed. ND, not determined because site was dry; *, not determined because plates were contaminated by fungi; AG, not determined because of alga bloom contamination; TNTC, too numerous to count; SNT, sample not taken. The column marked All contains the mean ± standard deviation for each site over all months, ignoring months without data.